Patents

Patent 1
Narrowband photosynthetically active radiation (‘PAR”) substantially only at
each of multiple emission wavelengths yields good photosynthesis at reduced
energy cost
https://patents.google.com/patent/US20140123555A1/en

Patent 2
Multiple colors, and color palettes, of narrowband photosynthetically active
radiation (PAR) time-staged over hours, days, and growing seasons yields
superior plant growth
https://patents.google.com/patent/US20180007838A1